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Electric rotary machine for motor vehicle

一种旋转机器、电压的技术，应用在集电器、电动汽车、车辆部件等方向，能够解决损坏等问题

Active Publication Date: 2014-02-12
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, when the charging line is disconnected from the output terminals of the alternator, this damage can easily occur

Method used

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  • Electric rotary machine for motor vehicle
  • Electric rotary machine for motor vehicle
  • Electric rotary machine for motor vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of various embodiments, like reference numerals refer to like parts throughout the several views.

[0021] Exemplary implementation

[0022] According to reference Figure 1 to Figure 10 As an exemplary embodiment of the present invention, an alternator 1 as an electric rotating machine used in a motor vehicle will be described.

[0023] figure 1 is a view showing the structure of the alternator 1 for a motor vehicle according to the exemplary embodiment. like figure 1 As shown in , an alternator 1 includes two stator windings (or armature windings) 2 and 3 and a field winding 4, two rectification module groups 5 and 6, a field control section 7, Zener diodes 20 and 30, and diode 22 (as a current limiting element). The Zener diode 20 corresponds to a first Zener diode used in the claims. The diode 22 corresponds to ...

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PUM

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Abstract

An alternator has rectifying module groups. The rectifying module groups form a bridge circuit. The rectifying module groups have a load dump protection judgment section for monitoring an output voltage of rectifying module groups. When the monitored output voltage exceeds a first threshold voltage, the load dump protection judgment section provides to a control section an instruction to turn on MOS transistors in a lower arm of the bridge circuit at a time when a predetermined delay time has elapsed. When a second threshold voltage is lower than the first threshold voltage and the monitored output voltage becomes less than the second threshold voltage after the monitored output voltage exceeds the first threshold voltage, the load dump protection judgment section provides to the control circuit an instruction to turn on the MOS transistors in the lower arm after the MOS transistors are turned off during a predetermined time length.

Description

technical field [0001] The present invention relates to an electric rotating machine or alternator mounted to motor vehicles such as passenger cars and trucks. Background technique [0002] An alternator mounted to a motor vehicle generates electricity by driving power transmitted from an internal combustion engine of the motor vehicle. Output terminals of the alternator are connected to terminals of a battery mounted to the motor vehicle through charging lines. The alternator supplies the generated electricity to the battery through the charging line. The alternator also supplies the generated electricity through other lines to various electrical loads mounted to the motor vehicle. High transient high voltages are generated when the charging line is disconnected from the output terminals of the alternator or the terminals of the battery while the alternator is running, ie during power generation. This transient voltage is known as load dump. When charging line disconnec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/00H02J7/14H02J7/16H02P9/04
CPCH02P9/107H02P9/48H02P9/102
Inventor 丸山敏典中西诚也木村明佐香猪口誉敏
Owner DENSO CORP
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